/* roulang page: index */
:root{
  --paper:#FBFAF8;
  --surface:#FFFFFF;
  --sand:#F1EEE9;
  --ink-900:#0E0F12;
  --ink-700:#33383F;
  --ink-500:#6C727C;
  --ink-300:#A8AEB7;
  --line:#E6E3DE;
  --brand:#FF4A2B;
  --brand-700:#E03A1D;
  --brand-50:#FFF0EC;
  --accent:#00B8A9;
  --accent-50:#E3F7F4;
  --ink-block:#0E0F12;
  --shadow-1:0 1px 2px rgba(14,15,18,.04), 0 8px 24px -12px rgba(14,15,18,.12);
  --shadow-2:0 2px 4px rgba(14,15,18,.06), 0 18px 40px -18px rgba(14,15,18,.22);
  --r-lg:20px;
  --r-md:16px;
  --r-sm:12px;
  --r-pill:999px;
  --font:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --num:"Inter","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:var(--font);
  font-size:17px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button,input{font-family:inherit;font-size:inherit;color:inherit;}
p{margin:0 0 1.2em;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;}
ul{margin:0;padding:0;list-style:none;}
h1{font-size:clamp(30px,5.2vw,58px);font-weight:900;line-height:1.08;letter-spacing:-.02em;}
h2{font-size:clamp(24px,3vw,34px);line-height:1.2;font-weight:800;}
h3{font-size:18px;line-height:1.45;font-weight:700;}
::selection{background:var(--brand-50);color:var(--brand-700);}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

.grid-container{max-width:1200px;padding-left:20px;padding-right:20px;}
.grid-container.wide{max-width:1320px;}
@media (min-width:640px){
  .grid-container{padding-left:32px;padding-right:32px;}
}
.section{padding:56px 0;}
@media (min-width:640px){.section{padding:72px 0;}}
@media (min-width:1024px){.section{padding:96px 0;}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(251,250,248,.92);
  -webkit-backdrop-filter:saturate(1.6) blur(10px);
  backdrop-filter:saturate(1.6) blur(10px);
  transition:box-shadow .2s ease,border-color .2s ease;
  border-bottom:1px solid transparent;
}
.site-header.scrolled{border-bottom-color:var(--line);box-shadow:0 4px 20px -14px rgba(14,15,18,.28);}
.brandbar{
  height:64px;display:flex;align-items:center;
  transition:height .2s ease;
}
.site-header.scrolled .brandbar{height:56px;}
.brandbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;}
.brand{display:flex;align-items:center;gap:10px;min-width:0;}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:11px;
  background:var(--brand);display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 16px -8px rgba(255,74,43,.8);
}
.brand-mark svg{width:20px;height:20px;display:block;}
.brand-text{font-size:18px;font-weight:900;letter-spacing:-.02em;white-space:nowrap;}
.brandbar-right{display:flex;align-items:center;gap:10px;}
.trend{position:relative;}
.trend-btn{
  display:inline-flex;align-items:center;gap:6px;
  height:36px;padding:0 14px;border-radius:var(--r-pill);
  background:var(--surface);border:1px solid var(--line);
  font-size:13px;font-weight:600;color:var(--ink-700);cursor:pointer;
  transition:background .2s ease,border-color .2s ease,color .2s ease;
}
.trend-btn:hover{background:var(--brand-50);border-color:#F6CBBF;color:var(--brand-700);}
.trend-arrow{font-size:11px;color:var(--brand);}
.trend-menu{
  position:absolute;top:calc(100% + 8px);right:0;min-width:190px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);
  box-shadow:var(--shadow-2);padding:8px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s;
}
.trend:hover .trend-menu,.trend:focus-within .trend-menu{opacity:1;visibility:visible;transform:translateY(0);}
.trend-menu a{display:block;padding:9px 12px;border-radius:8px;font-size:14px;color:var(--ink-700);}
.trend-menu a:hover{background:var(--sand);color:var(--ink-900);}
.icon-btn{
  width:44px;height:44px;border-radius:var(--r-sm);border:1px solid var(--line);
  background:var(--surface);display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;transition:background .2s ease,border-color .2s ease;
}
.icon-btn:hover{background:var(--sand);}
.icon-btn svg{width:18px;height:18px;stroke:var(--ink-700);fill:none;stroke-width:1.8;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,background .18s ease,box-shadow .18s ease,border-color .18s ease,color .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;text-shadow:0 .5px 0 rgba(0,0,0,.14);}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink-900);}
.btn-ghost:hover{background:var(--sand);transform:translateY(-1px);}
.btn-dark-ghost{background:transparent;border-color:rgba(255,255,255,.28);color:#fff;}
.btn-dark-ghost:hover{background:rgba(255,255,255,.1);transform:translateY(-1px);}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;}
.arrow{display:inline-block;transition:transform .2s ease;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--ink-900);}
.link-arrow .arrow{color:var(--brand);}
.link-arrow:hover .arrow{transform:translateX(4px);}
.link-arrow:hover{color:var(--brand);}
.channelbar{height:44px;display:flex;align-items:center;overflow:hidden;transition:height .2s ease,opacity .2s ease;}
.site-header.scrolled .channelbar{height:0;opacity:0;}
.channel-list{display:flex;align-items:center;gap:26px;overflow-x:auto;scrollbar-width:none;width:100%;}
.channel-list::-webkit-scrollbar{display:none;}
.channel-list a{
  position:relative;font-size:14px;font-weight:600;color:var(--ink-500);white-space:nowrap;
  padding:12px 0;display:inline-block;transition:color .2s ease;
}
.channel-list a::after{
  content:"";position:absolute;left:0;right:0;bottom:4px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.channel-list a:hover{color:var(--ink-900);}
.channel-list a:hover::after{transform:scaleX(1);}
.channel-list a.active{color:var(--ink-900);}
.channel-list a.active::after{transform:scaleX(1);}
.search-row{
  max-height:0;overflow:hidden;transition:max-height .22s ease;
  border-top:0 solid var(--line);
}
.search-row.open{max-height:88px;border-top:1px solid var(--line);}
.search-row-inner{display:flex;gap:8px;padding:14px 0;}
.search-row input{
  flex:1;height:48px;border-radius:var(--r-sm);border:1px solid var(--line);
  background:var(--surface);padding:0 16px;font-size:15px;
}
.search-row input::placeholder{color:var(--ink-300);}
.search-row input:focus{outline:none;border:1.5px solid var(--brand);box-shadow:0 0 0 4px var(--brand-50);}
.hamburger{display:none;}
@media (max-width:1023px){
  .brand-text{font-size:16px;}
  .trend{display:none;}
  .hamburger{display:inline-flex;}
  .channel-list{display:none;}
  .channelbar{display:none;}
  .site-header.scrolled .channelbar{display:none;}
}
@media (min-width:1024px){
  .hamburger{display:none;}
}

/* 移动端抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,15,18,.42);z-index:70;
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;
}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84%;max-width:340px;z-index:80;
  background:var(--surface);transform:translateX(102%);
  transition:transform .28s cubic-bezier(.2,.7,.3,1);
  display:flex;flex-direction:column;padding:20px;overflow-y:auto;
}
body.drawer-open .drawer-mask{opacity:1;visibility:visible;}
body.drawer-open .drawer{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer-title{font-size:16px;font-weight:800;}
.drawer-close{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:var(--surface);cursor:pointer;font-size:18px;line-height:1;
}
.drawer nav a{
  display:block;padding:14px 12px;border-radius:10px;font-size:16px;font-weight:600;color:var(--ink-700);
}
.drawer nav a:hover,.drawer nav a.active{background:var(--brand-50);color:var(--brand-700);}
.drawer .drawer-cta{margin-top:20px;}

/* ============ 通用组件 ============ */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--ink-500);
  text-transform:uppercase;margin-bottom:18px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);display:block;}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-pill);font-size:12px;font-weight:600;white-space:nowrap;
}
.badge-accent{background:var(--accent-50);color:var(--accent);}
.badge-brand{background:var(--brand);color:#fff;text-shadow:0 .5px 0 rgba(0,0,0,.14);}
.badge-line{background:transparent;border:1px solid var(--line);color:var(--ink-500);}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
  margin-bottom:32px;flex-wrap:wrap;
}
.section-head p{color:var(--ink-500);font-size:15px;margin:8px 0 0;max-width:52ch;line-height:1.75;}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--shadow-1);transition:transform .22s ease,box-shadow .22s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.cover{
  position:relative;overflow:hidden;background:var(--sand);
}
.cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s cubic-bezier(.2,.7,.3,1);}
.card:hover .cover img{transform:scale(1.04);}
.ratio-16-9{aspect-ratio:16/9;}
.ratio-9-16{aspect-ratio:9/16;}
.ratio-1-1{aspect-ratio:1/1;}
.reveal{opacity:0;transform:translateY(12px);transition:opacity .3s cubic-bezier(.2,.7,.3,1),transform .3s cubic-bezier(.2,.7,.3,1);}
.reveal.in{opacity:1;transform:none;}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:56px 0 64px;}
@media (min-width:1024px){.hero{padding:80px 0 88px;}}
.hero-grid{
  position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(to right,rgba(14,15,18,.04) 0 1px,transparent 1px 12.5%);
}
.hero-glow{
  position:absolute;right:-120px;top:-160px;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,74,43,.12),rgba(255,74,43,0) 70%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;}
.hero-copy{padding-bottom:36px;}
.hero-sub{font-size:18px;line-height:1.7;color:var(--ink-700);margin:20px 0 32px;max-width:34ch;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
.hero-stats{display:flex;margin-top:40px;flex-wrap:wrap;row-gap:20px;}
.hero-stats .stat{padding:0 22px;border-left:1px solid var(--line);}
.hero-stats .stat:first-child{padding-left:0;border-left:0;}
.stat-num{font-family:var(--num);font-size:32px;font-weight:900;line-height:1.1;letter-spacing:-.02em;}
.stat-label{font-size:13px;color:var(--ink-500);line-height:1.5;}
.hero-media{display:flex;justify-content:center;}
.phone-card{
  position:relative;width:100%;max-width:340px;aspect-ratio:9/16;max-height:600px;
  border-radius:var(--r-lg);overflow:hidden;background:var(--sand);
  box-shadow:var(--shadow-2);
  outline:1px solid rgba(255,255,255,.5);outline-offset:-1px;
}
@media (min-width:1024px){
  .hero-media{justify-content:flex-end;padding-left:32px;}
  .phone-card{max-width:330px;}
}
.phone-card img{width:100%;height:100%;object-fit:cover;}
.phone-shade{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,15,18,.15),rgba(14,15,18,.78));
}
.phone-play{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:56px;height:56px;border-radius:50%;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.72);
  display:flex;align-items:center;justify-content:center;
  transition:transform .2s ease,background .2s ease;
}
.phone-card:hover .phone-play{transform:translate(-50%,-50%) scale(1.06);background:rgba(255,255,255,.22);}
.phone-play svg{width:18px;height:18px;fill:#fff;margin-left:3px;}
.phone-duration{
  position:absolute;top:16px;right:16px;
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);
  background:rgba(14,15,18,.5);color:#fff;font-size:12px;font-weight:600;
}
.phone-caption{position:absolute;left:16px;right:16px;bottom:22px;}
.phone-caption strong{display:block;color:#fff;font-size:15px;font-weight:700;line-height:1.45;}
.phone-caption span{display:block;color:rgba(255,255,255,.72);font-size:12px;margin-top:4px;}
.phone-progress{position:absolute;left:0;right:0;bottom:0;height:2px;background:rgba(255,255,255,.22);}
.phone-progress i{display:block;width:40%;height:100%;background:var(--brand);}

/* ============ 片段轨道 ============ */
.track-wrap{position:relative;}
.track{
  display:flex;gap:16px;overflow-x:auto;padding:6px 2px 22px;
  scroll-snap-type:x mandatory;scrollbar-width:none;
}
.track::-webkit-scrollbar{display:none;}
.clip{
  position:relative;flex:0 0 170px;aspect-ratio:9/16;border-radius:var(--r-lg);
  overflow:hidden;background:var(--sand);scroll-snap-align:start;
  transition:transform .24s ease,box-shadow .24s ease;box-shadow:var(--shadow-1);
}
@media (min-width:768px){.clip{flex:0 0 200px;}}
.clip:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.clip img{width:100%;height:100%;object-fit:cover;}
.clip-shade{position:absolute;inset:0;background:linear-gradient(180deg,rgba(14,15,18,.05) 20%,rgba(14,15,18,.82));}
.clip-rank{
  position:absolute;top:12px;left:12px;height:24px;padding:0 10px;border-radius:var(--r-pill);
  background:var(--brand);color:#fff;font-size:12px;font-weight:700;display:inline-flex;align-items:center;
  text-shadow:0 .5px 0 rgba(0,0,0,.14);
}
.clip-hot{
  position:absolute;top:12px;right:12px;height:24px;padding:0 8px;border-radius:var(--r-pill);
  background:var(--accent-50);color:var(--accent);font-size:12px;font-weight:700;
  display:inline-flex;align-items:center;
}
.clip-play{
  position:absolute;left:50%;top:42%;transform:translate(-50%,-50%) scale(.8);
  width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.9);
  display:flex;align-items:center;justify-content:center;opacity:0;
  transition:opacity .22s ease,transform .22s ease;
}
.clip:hover .clip-play{opacity:1;transform:translate(-50%,-50%) scale(1);}
.clip-play svg{width:14px;height:14px;fill:var(--ink-900);margin-left:2px;}
.clip-info{position:absolute;left:14px;right:14px;bottom:14px;}
.clip-info strong{display:block;color:#fff;font-size:14px;font-weight:700;line-height:1.4;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.clip-info span{display:block;color:rgba(255,255,255,.72);font-size:12px;margin-top:5px;}
.clip-more{
  flex:0 0 170px;aspect-ratio:9/16;border-radius:var(--r-lg);border:1px dashed var(--line);
  background:var(--surface);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
  color:var(--ink-700);font-size:14px;font-weight:700;scroll-snap-align:start;
  transition:background .2s ease,border-color .2s ease;
}
@media (min-width:768px){.clip-more{flex:0 0 200px;}}
.clip-more:hover{background:var(--brand-50);border-color:#F6CBBF;color:var(--brand-700);}
.clip-more i{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-style:normal;font-size:18px;color:var(--brand);
}

/* ============ 种草清单 ============ */
.pick-list{border-top:1px solid var(--line);}
.pick{
  display:flex;align-items:flex-start;gap:20px;padding:20px 12px;
  border-bottom:1px solid var(--line);transition:background .2s ease;
}
.pick:hover{background:var(--sand);}
.pick-num{
  flex:0 0 72px;font-family:var(--num);font-size:48px;font-weight:900;line-height:1;
  color:transparent;-webkit-text-stroke:1.5px var(--ink-300);
  transition:color .2s ease,-webkit-text-stroke-color .2s ease;
}
.pick:hover .pick-num{-webkit-text-stroke-color:var(--brand);color:var(--brand);}
.pick-body{flex:1;min-width:0;}
.pick-body h3{margin-bottom:6px;}
.pick-body p{font-size:15px;color:var(--ink-500);line-height:1.75;margin:0;}
.pick-side{display:flex;align-items:center;gap:12px;padding-top:6px;flex:0 0 auto;}
.pick-side .arrow{color:var(--ink-300);}
.pick:hover .pick-side .arrow{color:var(--brand);transform:translateX(4px);}
@media (max-width:639px){
  .pick{flex-wrap:wrap;gap:12px;}
  .pick-num{flex:0 0 auto;font-size:40px;}
  .pick-side{width:100%;padding-top:0;}
}

/* ============ 资讯列表 ============ */
.news-grid{margin-left:-16px;margin-right:-16px;}
.news-cell{padding:0 16px 32px;}
.news-card{display:flex;flex-direction:column;height:100%;}
.news-card .cover{border-radius:var(--r-md) var(--r-md) 0 0;}
.news-cover{display:block;position:relative;border-radius:var(--r-md) var(--r-md) 0 0;overflow:hidden;}
.news-cover .badge{position:absolute;left:12px;top:12px;}
.news-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1;}
.news-title{font-size:18px;line-height:1.45;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-title a:hover{color:var(--brand);}
.news-summary{font-size:15px;color:var(--ink-500);line-height:1.75;margin:0 0 16px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-500);border-top:1px solid var(--line);padding-top:14px;}
.news-meta .arrow{color:var(--brand);}
.news-card:hover .news-meta .arrow{transform:translateX(4px);}
.empty-state{
  text-align:center;padding:48px 20px;border:1px dashed var(--line);border-radius:var(--r-md);
  background:var(--surface);
}
.empty-state svg{width:34px;height:34px;stroke:var(--ink-300);fill:none;stroke-width:1.6;margin:0 auto 14px;}
.empty-title{font-size:16px;font-weight:700;color:var(--ink-700);margin:0 0 6px;}
.empty-desc{font-size:14px;color:var(--ink-500);margin:0;line-height:1.7;}

/* ============ 口碑跑马灯 ============ */
.score-row{display:flex;align-items:center;gap:14px;}
.score-num{font-family:var(--num);font-size:34px;font-weight:900;line-height:1;}
.stars{display:inline-flex;gap:2px;color:var(--brand);font-size:14px;letter-spacing:1px;}
.marquee{
  position:relative;overflow:hidden;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 48px,#000 calc(100% - 48px),transparent);
  mask-image:linear-gradient(90deg,transparent,#000 48px,#000 calc(100% - 48px),transparent);
}
.marquee-track{display:flex;gap:16px;width:max-content;animation:marquee 46s linear infinite;}
.marquee:hover .marquee-track{animation-play-state:paused;}
@keyframes marquee{from{transform:translateX(0);}to{transform:translateX(-50%);}}
.quote{
  flex:0 0 300px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:18px 20px;box-shadow:var(--shadow-1);display:flex;gap:14px;align-items:flex-start;
}
@media (min-width:768px){.quote{flex:0 0 330px;}}
.quote-avatar{
  width:40px;height:40px;flex:0 0 40px;border-radius:50%;background:var(--brand-50);
  color:var(--brand-700);font-size:14px;font-weight:800;display:flex;align-items:center;justify-content:center;
}
.quote-body{min-width:0;}
.quote-name{font-size:13px;color:var(--ink-500);margin-bottom:4px;}
.quote-text{font-size:15px;color:var(--ink-700);line-height:1.65;margin:0 0 8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.quote .stars{font-size:12px;}
@media (max-width:767px){
  .marquee{-webkit-mask-image:none;mask-image:none;overflow-x:auto;scrollbar-width:none;scroll-snap-type:x mandatory;}
  .marquee::-webkit-scrollbar{display:none;}
  .marquee-track{animation:none;}
  .quote{scroll-snap-align:start;}
}

/* ============ 深色下载区 ============ */
.dl-panel{
  position:relative;border-radius:var(--r-md);overflow:hidden;color:#fff;
  background-color:var(--ink-block);
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:16px 16px;
  padding:40px 24px;
}
@media (min-width:768px){.dl-panel{border-radius:24px;padding:52px 48px;}}
.dl-panel h2{color:#fff;margin-bottom:14px;}
.dl-panel .dl-sub{color:rgba(255,255,255,.72);font-size:15px;line-height:1.8;margin:0 0 10px;max-width:46ch;}
.dl-note{color:rgba(255,255,255,.55);font-size:13px;margin:0;}
.dl-right{display:flex;flex-wrap:wrap;gap:20px;align-items:center;margin-top:28px;}
@media (min-width:1024px){.dl-right{margin-top:0;justify-content:flex-end;}}
.dl-buttons{display:flex;flex-direction:column;gap:10px;min-width:190px;}
.qr-box{
  width:120px;height:120px;border-radius:var(--r-sm);background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.14);display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:6px;color:rgba(255,255,255,.6);font-size:12px;
}
.qr-box svg{width:38px;height:38px;stroke:rgba(255,255,255,.55);fill:none;stroke-width:1.5;}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:none;border:0;text-align:left;cursor:pointer;
  padding:22px 0 22px 0;display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  font-size:17px;font-weight:700;line-height:1.6;color:var(--ink-900);position:relative;
  transition:color .2s ease;
}
.faq-q:hover{color:var(--brand);}
.faq-item.open .faq-q{color:var(--brand);}
.faq-item.open .faq-q::before{
  content:"";position:absolute;left:-16px;top:22px;bottom:22px;width:3px;border-radius:2px;background:var(--brand);
}
@media (max-width:639px){.faq-item.open .faq-q::before{left:0;}}
.faq-sign{
  flex:0 0 22px;font-size:20px;font-weight:400;color:var(--ink-300);line-height:1.4;text-align:center;
  transition:transform .22s ease,color .22s ease;
}
.faq-item.open .faq-sign{color:var(--brand);transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease;}
.faq-a p{font-size:15px;color:var(--ink-700);line-height:1.85;margin:0 0 22px;max-width:70ch;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-block);color:rgba(255,255,255,.72);margin-top:56px;padding:56px 0 28px;}
@media (min-width:1024px){.site-footer{margin-top:96px;padding:72px 0 32px;}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{box-shadow:none;}
.footer-brand span{color:#fff;font-size:17px;font-weight:900;}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);margin:0 0 18px;max-width:34ch;}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);position:relative;transition:color .2s ease;}
.footer-col a:hover{color:#fff;}
.footer-col a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.footer-col a:hover::after{transform:scaleX(1);}
.footer-sub{display:flex;gap:8px;margin-top:4px;}
.footer-sub input{
  flex:1;height:48px;border-radius:var(--r-sm);border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.06);padding:0 14px;font-size:14px;color:#fff;
}
.footer-sub input::placeholder{color:rgba(255,255,255,.45);}
.footer-sub input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(255,74,43,.18);}
.footer-mid{border-top:1px solid rgba(255,255,255,.12);margin-top:40px;padding-top:22px;
  display:flex;flex-wrap:wrap;gap:10px 22px;align-items:center;}
.footer-mid a{font-size:13px;color:rgba(255,255,255,.6);}
.footer-mid a:hover{color:#fff;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:22px;padding-top:20px;
  display:flex;flex-wrap:wrap;gap:8px 20px;align-items:center;justify-content:space-between;}
.footer-bottom p{font-size:13px;margin:0;color:rgba(255,255,255,.55);}
.footer-bottom .tiny{font-size:12px;color:rgba(255,255,255,.4);}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: article */
:root{
  --paper:#FBFAF8;
  --surface:#FFFFFF;
  --sand:#F1EEE9;
  --ink-900:#0E0F12;
  --ink-700:#33383F;
  --ink-500:#6C727C;
  --ink-300:#A8AEB7;
  --line:#E6E3DE;
  --brand:#FF4A2B;
  --brand-700:#E03A1D;
  --brand-50:#FFF0EC;
  --accent:#00B8A9;
  --accent-50:#E3F7F4;
  --ink-block:#0E0F12;
  --r-xl:24px;
  --r-lg:20px;
  --r-md:16px;
  --r-sm:12px;
  --shadow-1:0 1px 2px rgba(14,15,18,.04), 0 8px 24px -12px rgba(14,15,18,.12);
  --shadow-2:0 2px 4px rgba(14,15,18,.06), 0 18px 40px -18px rgba(14,15,18,.22);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:17px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--ink-900);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand);}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;padding-left:0;}
button{font-family:inherit;}
input{font-family:inherit;}
::selection{background:var(--brand-50);color:var(--brand-700);}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

.grid-container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
.grid-container.wide{max-width:1320px;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:700;line-height:1;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-primary{background:var(--brand);color:#fff;text-shadow:0 .5px 0 rgba(0,0,0,.18);box-shadow:0 6px 16px -10px rgba(224,58,29,.7);}
.btn-primary:hover{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-1);}
.btn-ghost{background:transparent;color:var(--ink-900);border-color:var(--line);}
.btn-ghost:hover{background:var(--sand);color:var(--ink-900);transform:translateY(-1px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{display:flex;width:100%;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--ink-900);}
.link-arrow svg{width:14px;height:14px;transition:transform .2s ease;}
.link-arrow:hover{color:var(--brand);}
.link-arrow:hover svg{transform:translateX(4px);}

.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;line-height:1;white-space:nowrap;
}
.badge-accent{background:var(--accent-50);color:var(--accent);}
.badge-brand{background:var(--brand);color:#fff;}
.badge-line{background:transparent;border:1px solid var(--line);color:var(--ink-500);}

.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:50%;
  background:transparent;border:1px solid var(--line);color:var(--ink-700);
  cursor:pointer;transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.icon-btn svg{width:17px;height:17px;}
.icon-btn:hover{background:var(--brand-50);border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(251,250,248,.94);
  -webkit-backdrop-filter:saturate(1.6) blur(10px);
  backdrop-filter:saturate(1.6) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 10px 30px -26px rgba(14,15,18,.55);}
.header-wrap{padding-top:0;padding-bottom:0;}
.brand-row{display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px;transition:height .2s ease;}
.site-header.is-stuck .brand-row{height:56px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:11px;
  background:var(--ink-block);color:#fff;
  box-shadow:0 8px 18px -12px rgba(14,15,18,.8);
}
.brand-mark svg{width:20px;height:20px;}
.brand-name{font-size:17px;font-weight:900;letter-spacing:-.01em;}
.brand-actions{display:flex;align-items:center;gap:10px;}
.trend-pill{position:relative;}
.trend-toggle{
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 16px;
  border-radius:999px;border:1px solid var(--line);background:var(--surface);
  font-size:13px;font-weight:600;color:var(--ink-700);cursor:pointer;
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.trend-toggle:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-50);}
.trend-dot{width:7px;height:7px;border-radius:50%;background:var(--brand);}
.trend-toggle svg{width:12px;height:12px;transition:transform .2s ease;}
.trend-pill:hover .trend-toggle svg,
.trend-pill:focus-within .trend-toggle svg{transform:rotate(180deg);}
.trend-menu{
  position:absolute;right:0;top:calc(100% + 10px);min-width:220px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--shadow-2);padding:8px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s;
}
.trend-pill:hover .trend-menu,
.trend-pill:focus-within .trend-menu{opacity:1;visibility:visible;transform:translateY(0);}
.trend-menu a{display:block;padding:9px 12px;border-radius:10px;font-size:13px;color:var(--ink-700);}
.trend-menu a:hover{background:var(--sand);color:var(--brand);}
.search-panel{max-height:0;overflow:hidden;transition:max-height .26s cubic-bezier(.2,.7,.3,1);}
.search-panel.open{max-height:100px;}
.search-form{display:flex;gap:8px;padding:0 0 16px;}
.search-form input{
  flex:1 1 auto;height:48px;padding:0 16px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:var(--surface);font-size:15px;color:var(--ink-900);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-form input::placeholder{color:var(--ink-300);}
.search-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-50);}
.channel-row{border-top:1px solid var(--line);}
.channel-list{display:flex;align-items:center;gap:26px;overflow-x:auto;scrollbar-width:none;}
.channel-list::-webkit-scrollbar{display:none;}
.channel-list a{
  position:relative;flex:0 0 auto;padding:14px 0;font-size:14px;font-weight:600;color:var(--ink-500);
  white-space:nowrap;
}
.channel-list a::after{
  content:"";position:absolute;left:0;right:0;bottom:8px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.channel-list a:hover{color:var(--ink-900);}
.channel-list a:hover::after{transform:scaleX(1);}
.channel-list a.active{color:var(--ink-900);font-weight:800;}
.channel-list a.active::after{transform:scaleX(1);}
.hamburger{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:var(--surface);align-items:center;justify-content:center;cursor:pointer;}
.hamburger span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;position:relative;}
.hamburger span::before,.hamburger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-900);border-radius:2px;}
.hamburger span::before{top:-6px;}
.hamburger span::after{top:6px;}

/* Drawer */
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,15,18,.42);z-index:60;
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);z-index:70;
  background:var(--surface);border-left:1px solid var(--line);
  padding:20px;transform:translateX(102%);
  transition:transform .28s cubic-bezier(.2,.7,.3,1);
  display:flex;flex-direction:column;gap:22px;overflow-y:auto;
}
.mobile-drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-head span{font-size:15px;font-weight:900;}
.drawer-nav{display:flex;flex-direction:column;}
.drawer-nav a{padding:14px 0;border-bottom:1px solid var(--line);font-size:16px;font-weight:700;}
.drawer-nav a.active{color:var(--brand);}
.drawer-trend h4{font-size:13px;font-weight:700;color:var(--ink-500);margin-bottom:10px;}
.drawer-trend a{display:block;padding:8px 0;font-size:14px;color:var(--ink-700);}

/* ---------- Article head ---------- */
.article-head{padding:36px 0 8px;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);margin-bottom:20px;}
.breadcrumb a{color:var(--ink-900);}
.breadcrumb a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px;}
.breadcrumb .sep{color:var(--ink-300);}
.breadcrumb .current{color:var(--ink-300);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:52vw;}
.article-head h1{
  font-size:clamp(28px,3.6vw,44px);font-weight:900;line-height:1.16;letter-spacing:-.02em;max-width:20em;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:20px;padding-bottom:22px;border-bottom:1px solid var(--line);}
.meta-item{font-size:13px;color:var(--ink-500);}
.meta-actions{margin-left:auto;display:flex;gap:8px;}

/* ---------- Article layout ---------- */
.article-wrap{padding:32px 0 8px;}
.article-body{max-width:760px;font-size:17px;line-height:1.9;color:var(--ink-700);}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  position:relative;font-size:26px;font-weight:800;line-height:1.32;color:var(--ink-900);
  margin:48px 0 16px;padding-left:14px;scroll-margin-top:130px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:3px;border-radius:2px;background:var(--brand);
}
.article-body h3{font-size:20px;font-weight:700;color:var(--ink-900);margin:32px 0 12px;line-height:1.4;}
.article-body h4{font-size:17px;font-weight:700;color:var(--ink-900);margin:24px 0 10px;}
.article-body ul,.article-body ol{list-style:none;margin:0 0 1.2em;}
.article-body li{position:relative;padding-left:20px;margin-bottom:9px;}
.article-body ul > li::before{
  content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;border-radius:2px;background:var(--brand);
}
.article-body ol{counter-reset:num;}
.article-body ol > li{counter-increment:num;}
.article-body ol > li::before{
  content:counter(num);position:absolute;left:0;top:.1em;font-size:14px;font-weight:900;color:var(--brand);
}
.article-body blockquote{
  margin:24px 0;padding:20px;background:var(--sand);border-left:3px solid var(--brand);
  border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--ink-700);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--r-sm);margin:20px 0;}
.article-body figure{margin:24px 0;}
.article-body figcaption{font-size:13px;color:var(--ink-500);text-align:center;margin-top:10px;}
.article-body a{color:var(--brand-700);text-decoration:underline;text-underline-offset:4px;}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;}
.article-body th{background:var(--sand);text-align:left;padding:12px;border-bottom:1px solid var(--line);font-weight:700;color:var(--ink-900);}
.article-body td{padding:12px;border-bottom:1px solid var(--line);}
.article-body code{background:var(--sand);padding:2px 6px;border-radius:6px;font-size:14px;}
.article-body pre{background:var(--ink-block);color:#fff;padding:20px;border-radius:var(--r-sm);overflow-x:auto;margin:24px 0;}
.article-body pre code{background:transparent;color:inherit;padding:0;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0;}

.empty-state{
  text-align:center;padding:56px 20px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-1);
}
.empty-state svg{width:34px;height:34px;color:var(--ink-300);margin:0 auto 14px;}
.empty-title{font-size:18px;font-weight:800;color:var(--ink-900);margin-bottom:6px;}
.empty-desc{font-size:14px;color:var(--ink-500);max-width:34em;margin:0 auto 20px;}

/* ---------- Sidebar ---------- */
.article-side{padding-top:32px;}
@media screen and (min-width:1024px){
  .article-side{padding-top:6px;}
  .side-sticky{position:sticky;top:126px;display:flex;flex-direction:column;gap:20px;}
}
.side-sticky{display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px;box-shadow:var(--shadow-1);
}
.side-title{font-size:14px;font-weight:800;color:var(--ink-900);margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-title::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--brand);}
.toc-list{display:flex;flex-direction:column;border-left:2px solid var(--line);}
.toc-list a{
  position:relative;padding:7px 0 7px 14px;font-size:14px;color:var(--ink-500);line-height:1.55;
  transition:color .2s ease;
}
.toc-list a::before{
  content:"";position:absolute;left:-2px;top:8px;bottom:8px;width:2px;border-radius:2px;
  background:var(--brand);opacity:0;transition:opacity .2s ease;
}
.toc-list a:hover{color:var(--ink-900);}
.toc-list a.active{color:var(--ink-900);font-weight:700;}
.toc-list a.active::before{opacity:1;}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;}
.tag-cloud a{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
  background:var(--accent-50);color:var(--accent);font-size:12px;font-weight:600;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.tag-cloud a:hover{background:var(--accent);color:#fff;transform:translateY(-1px);}
.side-download{background:var(--ink-block);border-color:var(--ink-block);color:#fff;}
.side-download .side-title{color:#fff;}
.side-download p{font-size:13px;line-height:1.75;color:rgba(255,255,255,.72);margin-bottom:16px;}
.side-download .btn{width:100%;}

/* ---------- Inline CTA ---------- */
.inline-cta{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  background:var(--ink-block);border-radius:var(--r-md);padding:20px;margin:36px 0 0;
}
.inline-cta-title{font-size:16px;font-weight:800;color:#fff;}
.inline-cta-desc{font-size:13px;color:rgba(255,255,255,.72);margin-top:4px;}
.article-tags{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:28px;padding-top:22px;border-top:1px solid var(--line);}
.tag-label{font-size:13px;font-weight:700;color:var(--ink-500);}
.article-tags a{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
  background:var(--accent-50);color:var(--accent);font-size:12px;font-weight:600;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.article-tags a:hover{background:var(--accent);color:#fff;transform:translateY(-1px);}

/* ---------- Sections ---------- */
.section{padding:56px 0;border-top:1px solid var(--line);}
.section:first-of-type{border-top:0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px;}
.section-head h2{font-size:clamp(24px,2.6vw,32px);font-weight:800;line-height:1.2;letter-spacing:-.01em;}
.section-head .sub{font-size:14px;color:var(--ink-500);margin-top:8px;}

.card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);box-shadow:var(--shadow-1);overflow:hidden;
  transition:transform .24s cubic-bezier(.2,.7,.3,1),box-shadow .24s ease,border-color .24s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#DEDAD4;color:var(--ink-900);}
.card-thumb{position:relative;display:block;aspect-ratio:16/9;background:var(--sand);overflow:hidden;}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s cubic-bezier(.2,.7,.3,1);}
.card:hover .card-thumb img{transform:scale(1.04);}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;}
.card-body h3{font-size:18px;font-weight:700;line-height:1.45;color:var(--ink-900);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-body p{font-size:14px;line-height:1.75;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.card-meta{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-500);margin-top:auto;}
.card-meta svg{width:14px;height:14px;transition:transform .2s ease;}
.card:hover .card-meta svg{transform:translateX(4px);color:var(--brand);}
.card-tag{position:absolute;top:12px;left:12px;}

/* ---------- Prev / Next ---------- */
.pn-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.pn-card{
  display:flex;flex-direction:column;gap:8px;padding:22px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease;
}
.pn-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);color:var(--ink-900);}
.pn-label{font-size:12px;font-weight:700;color:var(--ink-500);letter-spacing:.06em;}
.pn-title{font-size:17px;font-weight:700;line-height:1.5;color:var(--ink-900);}
.pn-card.next{align-items:flex-start;}
.back-row{display:flex;justify-content:center;margin-top:32px;}
.back-link{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:var(--ink-700);}
.back-link svg{width:15px;height:15px;transition:transform .2s ease;}
.back-link:hover{color:var(--brand);}
.back-link:hover svg{transform:translateY(-4px);}

/* ---------- Dark CTA ---------- */
.cta-block{
  position:relative;overflow:hidden;background:var(--ink-block);color:#fff;
  border-radius:var(--r-xl);padding:40px;
}
.cta-block::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.08) 1px,transparent 1px);
  background-size:16px 16px;opacity:.7;pointer-events:none;
}
.cta-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:36px;align-items:center;}
.cta-block h2{font-size:clamp(24px,2.8vw,34px);font-weight:900;line-height:1.22;letter-spacing:-.01em;color:#fff;}
.cta-block p{margin-top:14px;font-size:15px;line-height:1.8;color:rgba(255,255,255,.72);}
.cta-note{margin-top:10px;font-size:13px;color:rgba(255,255,255,.55);}
.cta-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.28);color:#fff;}
.btn-outline-light:hover{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.5);transform:translateY(-1px);}
.qr-box{
  margin-top:22px;width:120px;height:120px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);
  display:flex;align-items:center;justify-content:center;gap:4px;
}
.qr-box span{display:block;width:6px;height:6px;border-radius:2px;background:rgba(255,255,255,.55);}
.qr-box span:nth-child(2){width:34px;height:34px;border-radius:8px;background:rgba(255,255,255,.28);}
.qr-box span:nth-child(3){width:14px;height:14px;border-radius:4px;background:rgba(255,255,255,.45);}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink-block);color:#fff;margin-top:72px;padding:56px 0 28px;}
.site-footer h4{font-size:14px;font-weight:800;color:#fff;margin-bottom:16px;}
.footer-col{margin-bottom:28px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:900;margin-bottom:14px;}
.footer-brand .brand-mark{background:var(--brand);box-shadow:none;}
.footer-desc{font-size:13px;line-height:1.8;color:rgba(255,255,255,.72);max-width:26em;}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{font-size:14px;color:rgba(255,255,255,.72);}
.footer-col ul a:hover{color:#fff;text-decoration:underline;text-decoration-color:var(--brand);text-underline-offset:4px;}
.footer-sub{display:flex;gap:8px;}
.footer-sub input{
  flex:1 1 auto;height:48px;padding:0 14px;border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.06);
  color:#fff;font-size:14px;
}
.footer-sub input::placeholder{color:rgba(255,255,255,.45);}
.footer-sub input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(255,74,43,.18);}
.footer-mid{
  display:flex;flex-wrap:wrap;gap:16px 24px;padding:20px 0;
  border-top:1px solid rgba(255,255,255,.12);border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-mid a{font-size:13px;color:rgba(255,255,255,.72);}
.footer-mid a:hover{color:#fff;text-decoration:underline;text-decoration-color:var(--brand);text-underline-offset:4px;}
.footer-bottom{padding-top:20px;}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.72);}
.footer-bottom .tiny{font-size:12px;color:rgba(255,255,255,.5);margin-top:8px;}

/* ---------- Motion ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .3s cubic-bezier(.2,.7,.3,1),transform .3s cubic-bezier(.2,.7,.3,1);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
}

/* ---------- Responsive ---------- */
@media screen and (max-width:1199px){
  .cta-grid{grid-template-columns:1fr;gap:28px;}
}
@media screen and (max-width:1023px){
  .channel-row{display:none;}
  .trend-pill{display:none;}
  .header-cta{display:none;}
  .hamburger{display:flex;}
  .article-body{max-width:none;}
  .breadcrumb .current{max-width:40vw;}
}
@media screen and (max-width:767px){
  body{font-size:16px;}
  .grid-container{padding-left:18px;padding-right:18px;}
  .brand-name{font-size:15px;}
  .article-head{padding-top:24px;}
  .article-head h1{font-size:clamp(24px,6.6vw,32px);}
  .breadcrumb .current{max-width:60vw;}
  .article-meta{gap:10px;}
  .meta-actions{margin-left:0;width:100%;}
  .article-body h2{font-size:22px;margin:38px 0 14px;}
  .article-body h3{font-size:18px;}
  .section{padding:44px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px;margin-bottom:24px;}
  .pn-grid{grid-template-columns:1fr;}
  .cta-block{padding:26px 20px;border-radius:var(--r-md);}
  .inline-cta{padding:18px;}
  .site-footer{padding:44px 0 24px;margin-top:56px;}
  .footer-col{margin-bottom:24px;}
  .card-body{padding:16px;}
}
@media screen and (max-width:520px){
  .brand-name{max-width:9em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .article-tags{gap:8px;}
  .cta-actions .btn{width:100%;}
  .search-form{flex-wrap:wrap;}
  .search-form input{flex:1 0 100%;}
}

/* roulang page: category1 */
/* ===================== 设计变量 ===================== */
:root{
  --paper:#FBFAF8;
  --surface:#FFFFFF;
  --sand:#F1EEE9;
  --ink-900:#0E0F12;
  --ink-700:#33383F;
  --ink-500:#6C727C;
  --ink-300:#A8AEB7;
  --line:#E6E3DE;
  --brand:#FF4A2B;
  --brand-700:#E03A1D;
  --brand-50:#FFF0EC;
  --accent:#00B8A9;
  --accent-50:#E3F7F4;
  --block:#0E0F12;
  --r-xl:20px;
  --r-lg:16px;
  --r-md:12px;
  --r-block:24px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(14,15,18,.04), 0 8px 24px -12px rgba(14,15,18,.12);
  --shadow-2:0 2px 4px rgba(14,15,18,.06), 0 18px 40px -18px rgba(14,15,18,.22);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
/* ===================== 基础 reset ===================== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;padding:0;background:var(--paper);color:var(--ink-900);
  font-family:var(--font);font-size:17px;line-height:1.9;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease}
a:hover,a:focus{color:var(--brand)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0;padding:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.2;letter-spacing:-.01em}
p{margin:0}
figure{margin:0}
::selection{background:var(--brand);color:#fff}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink-900);color:#fff;padding:10px 16px;border-radius:0 0 12px 0;z-index:200;font-size:14px}
.skip-link:focus{left:0;color:#fff}
/* ===================== Foundation 定制覆盖 ===================== */
html,body{font-family:var(--font)}
body{background:var(--paper)}
a{color:inherit}
a:hover,a:focus{color:var(--brand)}
ul,ol,dl{margin:0;list-style:none}
h1,h2,h3,h4{font-family:var(--font)}
.grid-container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
.grid-x{display:flex;flex-wrap:wrap;margin-left:-12px;margin-right:-12px}
.grid-margin-x{margin-left:-12px;margin-right:-12px}
.grid-x>.cell,.cell{padding-left:12px;padding-right:12px;min-width:0;flex:0 0 auto}
.small-12{width:100%}
.small-6{width:50%}
@media (min-width:640px){
  .grid-container{padding-left:24px;padding-right:24px}
  .medium-3{width:25%}
  .medium-6{width:50%}
  .medium-12{width:100%}
}
@media (min-width:1024px){
  .large-3{width:25%}
  .large-4{width:33.3333%}
  .large-5{width:41.6667%}
  .large-7{width:58.3333%}
  .large-9{width:75%}
}
/* ===================== 按钮 / 徽章 ===================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-md);
  font-size:15px;font-weight:700;border:1px solid transparent;white-space:nowrap;
  transition:transform .18s ease,background .18s ease,box-shadow .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;text-shadow:0 .5px 0 rgba(0,0,0,.12)}
.btn-primary:hover,.btn-primary:focus{background:var(--brand-700);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink-900)}
.btn-ghost:hover,.btn-ghost:focus{background:var(--sand);color:var(--ink-900)}
.btn-dark-ghost{background:transparent;border-color:rgba(255,255,255,.28);color:#fff}
.btn-dark-ghost:hover,.btn-dark-ghost:focus{background:rgba(255,255,255,.1);color:#fff}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn[aria-disabled="true"]{opacity:.45;pointer-events:none}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);font-size:12px;font-weight:600;line-height:1}
.badge-accent{background:var(--accent-50);color:#0F8A80}
.badge-brand{background:var(--brand);color:#fff}
.badge-line{border:1px solid var(--line);color:var(--ink-500);background:transparent}
/* ===================== 顶部导航 ===================== */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(251,250,248,.92);
  -webkit-backdrop-filter:saturate(1.6) blur(10px);
  backdrop-filter:saturate(1.6) blur(10px);
  border-bottom:1px solid transparent;
  transition:background .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 8px 24px -22px rgba(14,15,18,.9)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:68px;transition:height .2s ease}
.site-header.is-scrolled .topbar-inner{height:58px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:900;letter-spacing:-.01em;color:var(--ink-900)}
.brand:hover{color:var(--ink-900)}
.brand-mark{
  width:30px;height:30px;border-radius:9px;background:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 30px;
  box-shadow:0 6px 14px -8px rgba(255,74,43,.9);
}
.brand-mark svg{width:17px;height:17px}
.topbar-right{display:flex;align-items:center;gap:10px}
.trend{position:relative;display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 12px;border-radius:var(--r-pill);border:1px solid var(--line);background:var(--surface);font-size:13px;color:var(--ink-700);transition:border-color .2s ease,color .2s ease}
.trend:hover{border-color:var(--brand);color:var(--brand)}
.trend-label{font-size:12px;color:var(--ink-300)}
.trend svg{width:12px;height:12px}
.trend-menu{position:absolute;top:calc(100% + 10px);left:0;min-width:230px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-2);padding:8px;display:none}
.trend:hover .trend-menu,.trend:focus-within .trend-menu{display:block}
.trend-menu a{display:block;padding:9px 10px;border-radius:8px;font-size:13px;color:var(--ink-700)}
.trend-menu a:hover{background:var(--sand);color:var(--brand)}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-pill);border:1px solid var(--line);
  background:var(--surface);display:inline-flex;align-items:center;justify-content:center;
  color:var(--ink-700);transition:all .2s ease;flex:0 0 40px;
}
.icon-btn:hover{border-color:var(--ink-900);color:var(--ink-900);transform:translateY(-1px)}
.icon-btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.icon-btn svg{width:18px;height:18px}
.search-row{display:none;gap:8px;padding:0 0 16px}
.search-row.is-open{display:flex}
.search-row input{
  flex:1;min-width:0;height:48px;border-radius:var(--r-md);border:1px solid var(--line);
  background:var(--surface);padding:0 16px;font-size:15px;
}
.search-row input::placeholder{color:var(--ink-300)}
.search-row input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-50)}
.channel-bar{border-top:1px solid var(--line)}
.channel-list{display:flex;align-items:center;gap:28px;height:46px;overflow-x:auto;scrollbar-width:none}
.channel-list::-webkit-scrollbar{display:none}
.channel-list a{position:relative;font-size:15px;color:var(--ink-500);white-space:nowrap;padding:12px 0;transition:color .2s ease}
.channel-list a::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .2s ease}
.channel-list a:hover{color:var(--ink-900)}
.channel-list a:hover::after{transform:scaleX(.4)}
.channel-list a.active{color:var(--ink-900);font-weight:700}
.channel-list a.active::after{transform:scaleX(1)}
.burger{display:none}
@media (max-width:1023px){
  .channel-bar{display:none}
  .burger{display:inline-flex}
  .brand-text{font-size:16px}
}
@media (max-width:639px){
  .trend{display:none}
  .topbar-right .btn-sm{display:none}
  .brand-text{max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
}
/* ===================== 移动抽屉 ===================== */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,348px);z-index:90;
  background:var(--paper);border-left:1px solid var(--line);
  box-shadow:-20px 0 40px -24px rgba(14,15,18,.5);
  padding:20px 20px 32px;overflow-y:auto;
  transform:translateX(102%);visibility:hidden;
  transition:transform .26s cubic-bezier(.2,.7,.3,1),visibility .26s;
}
.drawer.is-open{transform:translateX(0);visibility:visible}
.drawer-mask{position:fixed;inset:0;background:rgba(14,15,18,.42);z-index:80;opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-title{font-size:15px;font-weight:800}
.drawer-nav a{display:flex;align-items:center;justify-content:space-between;padding:14px 0;font-size:16px;color:var(--ink-700);border-bottom:1px solid var(--line)}
.drawer-nav a.active{color:var(--brand);font-weight:700}
.drawer-form{display:flex;gap:8px;margin-top:20px}
.drawer-form input{flex:1;min-width:0;height:46px;border-radius:var(--r-md);border:1px solid var(--line);background:var(--surface);padding:0 14px;font-size:14px}
.drawer-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-50)}
.drawer-sub{margin-top:24px;font-size:13px;color:var(--ink-500);font-weight:700;letter-spacing:.02em}
.drawer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.drawer-tags a{display:inline-flex;align-items:center;height:30px;padding:0 12px;border-radius:var(--r-pill);background:var(--accent-50);color:#0F8A80;font-size:12px;font-weight:600}
.drawer-tags a:hover{background:var(--accent);color:#fff}
/* ===================== 横幅 Hero ===================== */
.page-hero{position:relative;overflow:hidden;background:var(--sand);border-bottom:1px solid var(--line);padding:58px 0 52px}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(90deg,rgba(14,15,18,.04) 0 1px,transparent 1px 96px);
}
.page-hero::after{
  content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,74,43,.12),transparent 68%);pointer-events:none;
}
.hero-copy{position:relative;z-index:2;padding-right:24px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--brand);margin-bottom:16px}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--brand)}
.page-hero h1{font-size:clamp(34px,5vw,58px);font-weight:900;line-height:1.06;letter-spacing:-.02em}
.hero-sub{margin-top:18px;font-size:15px;line-height:1.85;color:var(--ink-500);max-width:38em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-figure{position:relative;z-index:2}
.hero-media{position:relative;border-radius:var(--r-xl);overflow:hidden;background:var(--ink-900);box-shadow:var(--shadow-1)}
.hero-media img{width:100%;aspect-ratio:16/11;object-fit:cover;object-position:center}
.hero-media::after{content:"";position:absolute;inset:0;background:rgba(14,15,18,.2)}
.hero-media figcaption{position:absolute;left:20px;right:20px;bottom:16px;z-index:2;color:#fff;font-size:13px;line-height:1.6}
@media (max-width:1023px){
  .hero-copy{padding-right:12px;margin-bottom:28px}
  .hero-media img{aspect-ratio:16/9}
}
@media (max-width:639px){
  .page-hero{padding:40px 0 36px}
  .hero-media img{aspect-ratio:4/3}
  .hero-actions .btn{width:100%}
}
/* ===================== 筛选条 ===================== */
.filter-bar{padding:14px 0;border-bottom:1px solid var(--line);background:var(--paper)}
.filter-scroll{display:flex;align-items:center;gap:10px;overflow-x:auto;scrollbar-width:none;padding-bottom:2px}
.filter-scroll::-webkit-scrollbar{display:none}
.chip-group{display:flex;gap:8px;flex:none}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 14px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--surface);font-size:13px;color:var(--ink-700);
  white-space:nowrap;transition:all .18s ease;
}
.chip:hover{border-color:var(--brand);color:var(--brand)}
.chip.is-active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.chip:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.sort-group{display:flex;gap:8px;margin-left:auto;flex:none}
@media (max-width:1023px){
  .sort-group{margin-left:0;padding-left:12px;border-left:1px solid var(--line)}
}
/* ===================== 主体双栏 ===================== */
.content-section{padding:64px 0 72px}
.sidebar-inner{position:sticky;top:128px}
.side-title{font-size:13px;font-weight:700;color:var(--ink-300);letter-spacing:.06em;margin-bottom:10px}
.side-nav{border-top:1px solid var(--line);margin-bottom:32px}
.side-nav a{display:flex;align-items:center;justify-content:space-between;padding:14px 0;font-size:15px;color:var(--ink-700);border-bottom:1px solid var(--line)}
.side-nav a:hover{color:var(--brand)}
.side-nav a.is-current{color:var(--brand);font-weight:700}
.side-nav a svg{width:14px;height:14px;color:var(--ink-300)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag-cloud a{display:inline-flex;align-items:center;height:30px;padding:0 12px;border-radius:var(--r-pill);background:var(--accent-50);color:#0F8A80;font-size:12px;font-weight:600;transition:all .18s ease}
.tag-cloud a:hover{background:var(--accent);color:#fff}
.side-download{margin-top:32px;background:var(--block);border-radius:var(--r-lg);padding:22px 20px;color:#fff}
.side-download h3{font-size:16px;color:#fff;margin-bottom:8px}
.side-download p{font-size:13px;color:rgba(255,255,255,.72);line-height:1.75}
.side-download .btn{margin-top:16px;width:100%;height:44px;font-size:14px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:4px}
.section-head h2{font-size:clamp(22px,2.6vw,28px);font-weight:800}
.section-head .count{font-size:13px;color:var(--ink-500);flex:none}
.update-item{border-bottom:1px solid var(--line)}
.update-link{display:flex;align-items:center;gap:20px;padding:20px 12px;border-radius:var(--r-md);transition:background .2s ease}
.update-link:hover{background:var(--sand)}
.update-link:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}
.update-thumb{flex:0 0 240px;border-radius:12px;overflow:hidden;background:var(--sand);position:relative}
.update-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .28s ease}
.update-link:hover .update-thumb img{transform:scale(1.04)}
.update-body{flex:1;min-width:0;display:block}
.update-title{display:block;font-size:20px;font-weight:700;line-height:1.35;color:var(--ink-900);transition:color .2s ease}
.update-link:hover .update-title{color:var(--brand)}
.update-sum{
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-top:8px;font-size:15px;line-height:1.7;color:var(--ink-500);
}
.update-meta{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-top:14px;font-size:13px;color:var(--ink-500)}
.update-arrow{flex:0 0 18px;color:var(--ink-300);transition:transform .2s ease,color .2s ease}
.update-arrow svg{width:18px;height:18px}
.update-link:hover .update-arrow{transform:translateX(4px);color:var(--brand)}
@media (max-width:1023px){
  .sidebar-inner{position:static;margin-bottom:36px}
  .side-nav{display:flex;gap:20px;overflow-x:auto;border-top:0;border-bottom:1px solid var(--line);margin-bottom:24px;scrollbar-width:none}
  .side-nav::-webkit-scrollbar{display:none}
  .side-nav a{border-bottom:0;padding:12px 0;white-space:nowrap}
}
@media (max-width:767px){
  .update-link{flex-wrap:wrap;gap:14px;padding:20px 8px}
  .update-thumb{flex:1 1 100%}
  .update-title{font-size:18px}
  .update-arrow{display:none}
}
/* ===================== 分页 ===================== */
.pagination{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:36px}
.pagination a,.pagination span{
  display:inline-flex;align-items:center;justify-content:center;min-width:44px;height:44px;padding:0 12px;
  border-radius:var(--r-md);border:1px solid var(--line);background:var(--surface);
  font-size:14px;color:var(--ink-700);transition:all .18s ease;
}
.pagination a:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.pagination .is-current{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:700}
.pagination .dots{border-color:transparent;background:transparent;color:var(--ink-300)}
/* ===================== 更新节奏 ===================== */
.rhythm{padding:72px 0;background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.rhythm h2{font-size:clamp(24px,3vw,32px)}
.rhythm-desc{margin-top:16px;font-size:15px;line-height:1.85;color:var(--ink-500);max-width:32em}
.steps{margin-top:4px}
.step{display:flex;gap:18px;padding:20px 0;border-bottom:1px solid var(--line)}
.step:first-child{padding-top:0}
.step-num{flex:0 0 52px;font-size:36px;font-weight:900;line-height:1;color:var(--brand);font-variant-numeric:tabular-nums}
.step h3{font-size:17px;margin-bottom:6px}
.step p{font-size:14px;line-height:1.75;color:var(--ink-500)}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;margin-top:30px}
.metric{background:var(--surface);padding:22px 20px}
.metric strong{display:block;font-size:32px;font-weight:900;line-height:1.1;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.metric span{display:block;margin-top:8px;font-size:13px;color:var(--ink-500)}
@media (max-width:767px){
  .rhythm{padding:52px 0}
  .metrics{grid-template-columns:1fr}
  .step-num{flex:0 0 42px;font-size:30px}
}
/* ===================== 深色 CTA ===================== */
.cta-section{padding:72px 0}
.cta-block{position:relative;overflow:hidden;background:var(--block);border-radius:var(--r-block);padding:48px 44px;color:#fff}
.cta-block::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:18px 18px;opacity:.7;
}
.cta-inner{position:relative;z-index:2}
.cta-block h2{font-size:clamp(24px,3vw,34px);color:#fff}
.cta-block p{margin-top:14px;font-size:15px;line-height:1.8;color:rgba(255,255,255,.72);max-width:36em}
.cta-note{margin-top:10px;font-size:13px;color:rgba(255,255,255,.55)}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.qr-wrap{display:flex;flex-direction:column;align-items:center}
.qr-box{
  width:120px;height:120px;border-radius:12px;border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;
}
.qr-box svg{width:52px;height:52px;color:rgba(255,255,255,.6)}
.qr-text{margin-top:10px;font-size:12px;color:rgba(255,255,255,.6)}
@media (max-width:1023px){
  .qr-wrap{margin-top:28px;flex-direction:row;gap:16px;justify-content:flex-start}
  .qr-text{margin-top:0}
}
@media (max-width:639px){
  .cta-section{padding:52px 0}
  .cta-block{padding:32px 22px;border-radius:var(--r-lg)}
  .cta-actions .btn{width:100%}
}
/* ===================== FAQ ===================== */
.faq-section{padding:72px 0;border-top:1px solid var(--line)}
.faq-side h2{font-size:clamp(24px,3vw,32px)}
.faq-side p{margin-top:16px;font-size:15px;line-height:1.85;color:var(--ink-500);max-width:30em}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line);position:relative}
.faq-q{
  position:relative;width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 0;text-align:left;font-size:17px;font-weight:700;color:var(--ink-900);
  transition:color .2s ease,padding .2s ease;
}
.faq-q:hover{color:var(--brand)}
.faq-q:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}
.faq-icon{position:relative;flex:0 0 20px;height:20px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand);border-radius:2px;transition:transform .22s ease,opacity .22s ease}
.faq-icon::before{top:9px;left:0;width:20px;height:2px}
.faq-icon::after{left:9px;top:0;width:2px;height:20px}
.faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-item.is-open .faq-q{padding-left:14px}
.faq-item.is-open .faq-q::before{content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;background:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
.faq-item.is-open .faq-a{max-height:400px}
.faq-a-inner{padding:0 0 22px 14px;font-size:15px;line-height:1.85;color:var(--ink-700)}
@media (max-width:767px){
  .faq-section{padding:52px 0}
  .faq-side{margin-bottom:24px}
}
/* ===================== 页脚 ===================== */
.site-footer{background:var(--block);color:#fff;padding:56px 0 28px}
.footer-col{margin-bottom:28px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;color:#fff}
.footer-brand .brand-mark{width:28px;height:28px;border-radius:8px;flex:0 0 28px;box-shadow:none}
.footer-brand svg{width:16px;height:16px}
.footer-desc{margin-top:14px;font-size:13px;line-height:1.8;color:rgba(255,255,255,.72)}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{font-size:13px;color:rgba(255,255,255,.72)}
.footer-col ul a:hover{color:#fff;text-decoration:underline;text-decoration-color:var(--brand);text-underline-offset:4px}
.footer-sub{display:flex;gap:8px}
.footer-sub input{
  flex:1;min-width:0;height:46px;border-radius:var(--r-md);border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.06);color:#fff;padding:0 14px;font-size:14px;
}
.footer-sub input::placeholder{color:rgba(255,255,255,.45)}
.footer-sub input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(255,74,43,.18)}
.footer-sub .btn{height:46px;padding:0 18px;font-size:14px}
.footer-mid{border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding-top:22px;display:flex;flex-wrap:wrap;gap:16px}
.footer-mid a{font-size:13px;color:rgba(255,255,255,.72)}
.footer-mid a:hover{color:#fff;text-decoration:underline;text-decoration-color:var(--brand);text-underline-offset:4px}
.footer-bottom{
  margin-top:26px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.72)}
.footer-bottom .tiny{font-size:12px;color:rgba(255,255,255,.5)}
@media (max-width:639px){
  .site-footer{padding:44px 0 24px}
  .footer-col,.footer-col ul a,.footer-desc{font-size:12px}
  .footer-sub{flex-direction:column}
  .footer-sub .btn{width:100%}
}
/* ===================== 入场动效 ===================== */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .3s cubic-bezier(.2,.7,.3,1),transform .3s cubic-bezier(.2,.7,.3,1)}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category2 */
:root{
  --paper:#FBFAF8;
  --surface:#FFFFFF;
  --sand:#F1EEE9;
  --ink-900:#0E0F12;
  --ink-700:#33383F;
  --ink-500:#6C727C;
  --ink-300:#A8AEB7;
  --line:#E6E3DE;
  --brand:#FF4A2B;
  --brand-700:#E03A1D;
  --brand-50:#FFF0EC;
  --accent:#00B8A9;
  --accent-50:#E3F7F4;
  --ink-block:#0E0F12;
  --r-hero:20px;
  --r-card:16px;
  --r-btn:12px;
  --r-pill:999px;
  --r-block:24px;
  --shadow-1:0 1px 2px rgba(14,15,18,.04),0 8px 24px -12px rgba(14,15,18,.12);
  --shadow-2:0 2px 4px rgba(14,15,18,.06),0 18px 40px -18px rgba(14,15,18,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:17px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.2;letter-spacing:-.01em}
p{margin:0 0 1.2em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
svg{display:block}
::selection{background:var(--brand);color:#fff}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;border-radius:0 0 12px 0;z-index:99}
.skip-link:focus{left:0}

/* 容器 */
.grid-container{max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
.grid-container.wide{max-width:1320px}
@media(min-width:1024px){
  .grid-container{padding-left:32px;padding-right:32px}
}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;text-shadow:0 .5px 0 rgba(0,0,0,.18)}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink-900)}
.btn-ghost:hover{background:var(--sand)}
.btn-dark{background:var(--brand);color:#fff;text-shadow:0 .5px 0 rgba(0,0,0,.18)}
.btn-dark:hover{background:var(--brand-700);transform:translateY(-1px)}
.btn-dark-ghost{background:transparent;border-color:rgba(255,255,255,.28);color:#fff}
.btn-dark-ghost:hover{background:rgba(255,255,255,.1)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn[disabled]{opacity:.45;pointer-events:none}
.link-more{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--ink-900);
  position:relative;padding-bottom:2px;
}
.link-more::after{content:"";position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--brand);transition:width .2s var(--ease)}
.link-more:hover::after{width:100%}
.link-more svg{transition:transform .2s var(--ease)}
.link-more:hover svg{transform:translateX(4px)}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;line-height:1;white-space:nowrap;
}
.badge-accent{background:var(--accent-50);color:var(--accent)}
.badge-brand{background:var(--brand);color:#fff}
.badge-line{border:1px solid var(--line);color:var(--ink-500)}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(251,250,248,.92);
  -webkit-backdrop-filter:saturate(1.6) blur(10px);
  backdrop-filter:saturate(1.6) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.site-header.is-stuck{border-bottom-color:var(--line)}
.topbar-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:64px;transition:min-height .2s var(--ease);
}
.site-header.is-stuck .topbar-inner{min-height:56px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.brand-mark svg{width:22px;height:22px}
.brand-mark svg path:first-child{fill:#fff;opacity:.28}
.brand-mark svg .tri{fill:#fff}
.brand-name{font-size:17px;font-weight:800;letter-spacing:-.01em}
.topbar-tools{display:flex;align-items:center;gap:10px}
.hotwords{position:relative}
.hotword-toggle{
  display:inline-flex;align-items:center;gap:6px;height:38px;padding:0 14px;
  border-radius:var(--r-pill);border:1px solid var(--line);background:var(--surface);
  font-size:13px;font-weight:600;color:var(--ink-700);cursor:pointer;
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.hotword-toggle:hover{background:var(--brand-50);border-color:var(--brand-50);color:var(--brand-700)}
.hotword-toggle svg{width:12px;height:12px;transition:transform .2s var(--ease)}
.hotwords:hover .hotword-toggle svg,.hotwords:focus-within .hotword-toggle svg{transform:translateY(-2px)}
.hotword-menu{
  position:absolute;right:0;top:calc(100% + 8px);min-width:190px;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow-2);padding:8px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.hotwords:hover .hotword-menu,.hotwords:focus-within .hotword-menu{opacity:1;visibility:visible;transform:translateY(0)}
.hotword-menu a{
  display:block;padding:9px 12px;border-radius:10px;font-size:14px;color:var(--ink-700);
  transition:background .18s var(--ease),color .18s var(--ease);
}
.hotword-menu a:hover{background:var(--sand);color:var(--ink-900)}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-pill);border:1px solid var(--line);
  background:var(--surface);display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;transition:background .2s var(--ease),border-color .2s var(--ease);
}
.icon-btn:hover{background:var(--sand)}
.icon-btn svg{width:17px;height:17px;stroke:var(--ink-900);fill:none;stroke-width:1.8;stroke-linecap:round}
.icon-btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.search-row{display:none;padding-bottom:14px}
.site-header.search-open .search-row{display:block}
.search-form{display:flex;gap:8px}
.search-form input{
  flex:1 1 auto;height:48px;border-radius:var(--r-btn);border:1px solid var(--line);
  background:var(--surface);padding:0 16px;font-size:15px;
}
.search-form input::placeholder{color:var(--ink-300)}
.search-form input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-50)}
.channel-bar{border-top:1px solid transparent;transition:max-height .25s var(--ease),opacity .2s var(--ease),border-color .2s}
.site-header.is-stuck .channel-bar{border-top-color:var(--line)}
.channel-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:44px}
.channel-list{display:flex;align-items:center;gap:22px;overflow-x:auto;scrollbar-width:none;padding:0}
.channel-list::-webkit-scrollbar{display:none}
.channel-list a{
  position:relative;flex:0 0 auto;padding:11px 0;font-size:14px;font-weight:500;color:var(--ink-500);
  transition:color .2s var(--ease);
}
.channel-list a::after{
  content:"";position:absolute;left:0;right:0;bottom:6px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease);
}
.channel-list a:hover{color:var(--ink-900)}
.channel-list a:hover::after{transform:scaleX(1)}
.channel-list a.active{color:var(--ink-900);font-weight:700}
.channel-list a.active::after{transform:scaleX(1)}
.menu-toggle{display:none}
.menu-toggle .bars{display:flex;flex-direction:column;gap:4px}
.menu-toggle .bars span{display:block;width:16px;height:2px;border-radius:2px;background:var(--ink-900)}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,15,18,.4);opacity:0;visibility:hidden;
  transition:opacity .25s var(--ease),visibility .25s;z-index:60;
}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);background:var(--paper);
  z-index:70;transform:translateX(102%);transition:transform .28s var(--ease);
  display:flex;flex-direction:column;padding:20px;overflow-y:auto;
  box-shadow:-18px 0 40px -24px rgba(14,15,18,.3);
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-nav{display:flex;flex-direction:column;gap:2px;margin-bottom:22px}
.drawer-nav a{
  padding:13px 12px;border-radius:12px;font-size:15px;font-weight:600;color:var(--ink-700);
}
.drawer-nav a.active{background:var(--brand-50);color:var(--brand-700)}
.drawer-label{font-size:12px;font-weight:700;color:var(--ink-300);letter-spacing:.08em;margin:0 0 10px 12px}
.drawer-tags{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 22px 12px}

/* ============ 通用区块 ============ */
.section{padding:56px 0}
@media(min-width:640px){.section{padding:72px 0}}
@media(min-width:1024px){.section{padding:96px 0}}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap}
.sec-title{font-size:clamp(23px,3vw,34px);font-weight:800}
.sec-sub{font-size:15px;color:var(--ink-500);line-height:1.75;margin-top:10px;max-width:660px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;color:var(--brand);letter-spacing:.1em;margin-bottom:12px}
.eyebrow::before{content:"";width:20px;height:2px;background:var(--brand);border-radius:2px}

/* ============ 分类页2 Hero ============ */
.cat-hero{
  position:relative;overflow:hidden;
  padding:52px 0 48px;
  background:linear-gradient(180deg,#FFFFFF 0%,var(--paper) 100%);
  border-bottom:1px solid var(--line);
}
.cat-hero::before{
  content:"";position:absolute;top:-160px;right:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,74,43,.12),rgba(255,74,43,0) 68%);
  pointer-events:none;
}
.cat-hero .grid-x{position:relative;z-index:1}
.hero-title{font-size:clamp(32px,5vw,56px);font-weight:900;line-height:1.06;letter-spacing:-.02em}
.hero-sub{font-size:17px;color:var(--ink-700);margin-top:16px;max-width:560px}
.hero-note{font-size:15px;color:var(--ink-500);line-height:1.75;margin-top:12px;max-width:600px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-stats{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-hero);
  padding:8px 24px;box-shadow:var(--shadow-1);
}
.stat{display:flex;align-items:baseline;gap:12px;padding:18px 0;border-bottom:1px solid var(--line)}
.stat:last-child{border-bottom:none}
.stat-num{font-size:32px;font-weight:900;line-height:1;letter-spacing:-.02em;min-width:104px}
.stat-label{font-size:13px;color:var(--ink-500)}

/* 速览标签条 */
.quickbar{padding:26px 0 8px}
.tag-track{
  display:flex;gap:10px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:10px;scrollbar-width:none;-ms-overflow-style:none;
}
.tag-track::-webkit-scrollbar{display:none}
.tag-pill{
  flex:0 0 auto;scroll-snap-align:start;display:inline-flex;align-items:center;gap:6px;
  height:38px;padding:0 16px;border-radius:var(--r-pill);border:1px solid var(--line);
  background:var(--surface);font-size:14px;font-weight:600;color:var(--ink-700);
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.tag-pill:hover{background:var(--brand-50);border-color:var(--brand-50);color:var(--brand-700);transform:translateY(-1px)}
.tag-pill.is-on{background:var(--ink-900);border-color:var(--ink-900);color:#fff}
.tag-pill:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

/* ============ 瀑布卡片 ============ */
.waterfall{display:grid;grid-template-columns:1fr;gap:20px;align-items:start}
@media(min-width:768px){
  .waterfall{grid-template-columns:1fr 1fr;gap:24px}
  .wf-wide{grid-column:1 / -1}
  .wf-stagger{margin-top:32px}
}
.wf-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.wf-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.wf-link{display:block;height:100%}
.wf-media{position:relative;background:var(--sand);overflow:hidden}
.wf-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.wf-card:hover .wf-media img{transform:scale(1.04)}
.ratio-169{aspect-ratio:16/9}
.ratio-43{aspect-ratio:4/3}
.ratio-11{aspect-ratio:1/1}
.wf-index{
  position:absolute;top:12px;left:12px;height:24px;padding:0 10px;border-radius:var(--r-pill);
  background:rgba(14,15,18,.66);color:#fff;font-size:12px;font-weight:700;
  display:inline-flex;align-items:center;backdrop-filter:blur(4px);
}
.wf-tag{position:absolute;top:12px;right:12px}
.wf-overlay{
  position:absolute;left:0;right:0;bottom:0;padding:24px;
  background:linear-gradient(180deg,rgba(14,15,18,0),rgba(14,15,18,.82));
  color:#fff;
}
.wf-overlay h3{font-size:clamp(19px,2.4vw,24px);font-weight:800;margin-top:12px}
.wf-overlay p{font-size:14px;color:rgba(255,255,255,.78);line-height:1.7;margin-top:8px;max-width:640px}
.wf-body{padding:18px 20px 20px}
.wf-body h3{font-size:18px;font-weight:700;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.wf-body p{font-size:15px;color:var(--ink-500);line-height:1.7;margin-top:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.wf-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px}
.wf-meta{font-size:13px;color:var(--ink-500)}
.wf-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--ink-900)}
.wf-arrow svg{transition:transform .2s var(--ease)}
.wf-card:hover .wf-arrow svg{transform:translateX(4px)}

/* 横幅图带 */
.banner-strip{margin-top:8px}
.banner-strip .banner-img{
  width:100%;aspect-ratio:21/9;object-fit:cover;object-position:left center;
  border-radius:var(--r-block);background:var(--sand);
}
@media(max-width:520px){.banner-strip .banner-img{aspect-ratio:16/9}}

/* ============ 流程步骤 ============ */
.steps{display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:640px){.steps{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.steps{grid-template-columns:repeat(4,1fr)}}
.step{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px 22px;transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.step-num{
  font-size:44px;font-weight:900;line-height:1;color:transparent;
  -webkit-text-stroke:1.5px var(--brand);letter-spacing:-.03em;
}
.step:hover .step-num{color:var(--brand);-webkit-text-stroke:1.5px var(--brand)}
.step h3{font-size:17px;font-weight:700;margin-top:14px}
.step p{font-size:14px;color:var(--ink-500);line-height:1.75;margin-top:8px}

/* ============ 安装前必读 ============ */
.check-list{border-top:1px solid var(--line)}
.check-item{
  display:flex;gap:14px;padding:20px 0;border-bottom:1px solid var(--line);
  transition:background .2s var(--ease);
}
.check-item:hover{background:var(--sand)}
.check-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:8px;background:var(--accent-50);
  display:inline-flex;align-items:center;justify-content:center;margin-top:4px;
}
.check-icon svg{width:14px;height:14px;stroke:var(--accent);fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.check-item h3{font-size:17px;font-weight:700}
.check-item p{font-size:15px;color:var(--ink-500);line-height:1.75;margin-top:6px}
.spec-card{
  background:var(--ink-block);color:#fff;border-radius:var(--r-block);
  padding:28px 26px;box-shadow:var(--shadow-1);position:relative;overflow:hidden;
}
.spec-card::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:14px 14px;
}
.spec-card h3{font-size:18px;font-weight:800;position:relative;z-index:1}
.spec-card .spec-note{font-size:13px;color:rgba(255,255,255,.6);margin-top:8px;position:relative;z-index:1}
.spec-list{margin-top:20px;position:relative;z-index:1}
.spec-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:13px 0;border-bottom:1px solid rgba(255,255,255,.12);font-size:14px;
}
.spec-row:last-child{border-bottom:none}
.spec-row span:first-child{color:rgba(255,255,255,.62)}
.spec-row span:last-child{font-weight:700}
.spec-card .btn{position:relative;z-index:1;margin-top:22px;width:100%}

/* ============ FAQ ============ */
.faq-wrap{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:1024px){.faq-wrap{grid-template-columns:4fr 8fr;gap:48px}}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 0;font-size:17px;font-weight:700;line-height:1.5;
  transition:padding-left .22s var(--ease),color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";flex:0 0 auto;width:24px;height:24px;border-radius:50%;
  border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:600;color:var(--ink-500);line-height:1;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.faq-item summary:hover{color:var(--brand-700)}
.faq-item summary:hover::after{border-color:var(--brand);color:var(--brand)}
.faq-item[open] summary{padding-left:16px;border-left:3px solid var(--brand)}
.faq-item[open] summary::after{content:"−";background:var(--brand);border-color:var(--brand);color:#fff}
.faq-item .faq-body{padding:0 0 24px 16px;font-size:15px;color:var(--ink-700);line-height:1.85}

/* ============ 深色 CTA ============ */
.cta-block{
  background:var(--ink-block);color:#fff;border-radius:var(--r-block);
  padding:40px 28px;position:relative;overflow:hidden;
}
@media(min-width:1024px){.cta-block{padding:52px 48px}}
.cta-block::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:100% 14px;
  opacity:.6;
}
.cta-grid{position:relative;z-index:1;display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:1024px){.cta-grid{grid-template-columns:7fr 5fr;align-items:center}}
.cta-block h2{font-size:clamp(24px,3vw,34px);font-weight:800;color:#fff}
.cta-block .cta-text{font-size:15px;color:rgba(255,255,255,.72);line-height:1.8;margin-top:14px;max-width:520px}
.cta-block .cta-small{font-size:13px;color:rgba(255,255,255,.5);margin-top:12px}
.cta-right{display:flex;flex-direction:column;gap:16px}
.cta-btns{display:flex;flex-wrap:wrap;gap:12px}
.qr-box{
  width:120px;height:120px;border-radius:12px;background:rgba(255,255,255,.08);
  display:flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.qr-box svg{width:56px;height:56px;stroke:rgba(255,255,255,.5);fill:none;stroke-width:1.6}
.qr-line{display:flex;align-items:center;gap:16px}
.qr-line span{font-size:13px;color:rgba(255,255,255,.6);max-width:150px;line-height:1.6}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-block);color:#fff;margin-top:80px;padding:56px 0 28px}
.footer-col{margin-bottom:28px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:800}
.footer-desc{font-size:13px;color:rgba(255,255,255,.62);line-height:1.75;margin-top:12px;max-width:280px}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-col ul li{margin-bottom:9px}
.footer-col ul a{font-size:13px;color:rgba(255,255,255,.72);transition:color .2s var(--ease)}
.footer-col ul a:hover{color:#fff;text-decoration:underline;text-decoration-color:var(--brand);text-underline-offset:3px}
.footer-sub{display:flex;gap:8px}
.footer-sub input{
  flex:1 1 auto;min-width:0;height:44px;border-radius:var(--r-btn);
  border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.06);
  padding:0 14px;font-size:14px;color:#fff;
}
.footer-sub input::placeholder{color:rgba(255,255,255,.45)}
.footer-sub input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(255,74,43,.18)}
.footer-sub .btn{height:44px;padding:0 18px;font-size:14px}
.footer-mid{
  display:flex;flex-wrap:wrap;gap:10px 22px;
  border-top:1px solid rgba(255,255,255,.12);padding-top:22px;margin-top:8px;
}
.footer-mid a{font-size:13px;color:rgba(255,255,255,.62);transition:color .2s var(--ease)}
.footer-mid a:hover{color:#fff;text-decoration:underline;text-decoration-color:var(--brand);text-underline-offset:3px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:22px;padding-top:20px}
.footer-bottom p{font-size:12px;color:rgba(255,255,255,.55);margin:0 0 6px}
.footer-bottom .tiny{font-size:12px;color:rgba(255,255,255,.38)}

/* 入场动效 */
.rv{opacity:0;transform:translateY(12px);transition:opacity .3s var(--ease),transform .3s var(--ease)}
.rv.in{opacity:1;transform:translateY(0)}

@media (max-width:1023px){
  .channel-list{gap:18px}
  .channel-list a{font-size:13px}
  .menu-toggle{display:inline-flex}
  .channel-inner{min-height:46px}
}
@media (max-width:768px){
  .brand-name{font-size:15px}
  .hotwords{display:none}
  .hero-stats{padding:6px 20px;margin-top:28px}
  .stat-num{font-size:26px;min-width:88px}
  .sec-head{margin-bottom:24px}
  .cta-block{padding:32px 22px}
}
@media (max-width:520px){
  body{font-size:16px}
  .btn{height:46px;padding:0 18px;font-size:14px}
  .hero-actions .btn{width:100%}
  .hero-stats{margin-top:24px}
  .wf-overlay{padding:18px}
  .spec-card{padding:22px 18px}
}
@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
  --paper:#FBFAF8;
  --surface:#FFFFFF;
  --sand:#F1EEE9;
  --ink-900:#0E0F12;
  --ink-700:#33383F;
  --ink-500:#6C727C;
  --ink-300:#A8AEB7;
  --line:#E6E3DE;
  --brand:#FF4A2B;
  --brand-700:#E03A1D;
  --brand-50:#FFF0EC;
  --accent:#00B8A9;
  --accent-50:#E3F7F4;
  --ink-block:#0E0F12;
  --radius-xl:24px;
  --radius-lg:20px;
  --radius:16px;
  --radius-sm:12px;
  --shadow-1:0 1px 2px rgba(14,15,18,.04), 0 8px 24px -12px rgba(14,15,18,.12);
  --shadow-2:0 2px 4px rgba(14,15,18,.06), 0 18px 40px -18px rgba(14,15,18,.22);
  --section-y:56px;
}

*,*::before,*::after{box-sizing:border-box;}

html{scroll-behavior:smooth;}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:17px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0;}

h1,h2,h3,h4{
  margin:0;
  font-weight:800;
  line-height:1.2;
  letter-spacing:-0.01em;
  color:var(--ink-900);
}

.grid-container{
  max-width:1200px;
  padding-left:20px;
  padding-right:20px;
  margin-left:auto;
  margin-right:auto;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border-radius:var(--radius-sm);
  font-size:15px;
  font-weight:700;
  white-space:nowrap;
  transition:transform .18s ease,background-color .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.btn-primary{
  background:var(--brand);
  color:#fff;
  text-shadow:0 .5px 0 rgba(0,0,0,.18);
  box-shadow:var(--shadow-1);
}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-ghost{
  border:1px solid var(--line);
  color:var(--ink-900);
  background:var(--surface);
}
.btn-ghost:hover{background:var(--sand);transform:translateY(-1px);}
.btn-sm{height:42px;padding:0 18px;font-size:14px;}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:700;
  color:var(--ink-900);
}
.link-arrow svg{transition:transform .2s ease;}
.link-arrow:hover{color:var(--brand);}
.link-arrow:hover svg{transform:translateX(4px);}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}

/* ---------- 徽章 / 胶囊 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  line-height:1;
  background:var(--accent-50);
  color:var(--accent);
}
.badge-hot{background:var(--brand);color:#fff;}
.badge-line{background:transparent;border:1px solid var(--line);color:var(--ink-500);}
.kicker{
  display:inline-block;
  font-size:12px;
  font-weight:800;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--brand);
  margin-bottom:12px;
}
.kicker::before{
  content:"";
  display:inline-block;
  width:18px;
  height:2px;
  background:var(--brand);
  vertical-align:middle;
  margin-right:8px;
  transform:translateY(-2px);
}

/* ---------- 吸顶导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(251,250,248,.92);
  -webkit-backdrop-filter:saturate(1.6) blur(10px);
  backdrop-filter:saturate(1.6) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.site-header.is-stuck{
  border-bottom-color:var(--line);
  box-shadow:0 10px 24px -22px rgba(14,15,18,.55);
}
.header-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  height:64px;
  transition:height .2s ease;
}
.site-header.is-stuck .header-top{height:56px;}

.brand{display:flex;align-items:center;gap:10px;}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;
  border-radius:11px;
  background:var(--brand);
  display:grid;place-items:center;
  box-shadow:0 8px 16px -10px rgba(255,74,43,.9);
}
.brand-mark svg{width:20px;height:20px;}
.brand-text{font-size:18px;font-weight:900;letter-spacing:-.01em;white-space:nowrap;}

.header-actions{display:flex;align-items:center;gap:10px;}

.trend-wrap{position:relative;}
.trend-pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:36px;
  padding:0 14px;
  border-radius:999px;
  background:var(--brand-50);
  color:var(--brand-700);
  font-size:13px;
  font-weight:700;
  transition:background-color .18s ease;
}
.trend-pill:hover{background:#FFE2DA;}
.trend-pill .caret{font-size:9px;transform:translateY(-1px);}
.trend-drop{
  position:absolute;
  top:44px;right:0;
  width:230px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-2);
  padding:8px;
  opacity:0;
  visibility:hidden;
  transform:translateY(-6px);
  transition:opacity .18s ease,transform .18s ease,visibility .18s;
}
.trend-drop.is-open{opacity:1;visibility:visible;transform:translateY(0);}
.trend-drop a{
  display:block;
  padding:9px 12px;
  border-radius:10px;
  font-size:14px;
  color:var(--ink-700);
}
.trend-drop a:hover{background:var(--sand);color:var(--ink-900);}

.icon-btn{
  width:40px;height:40px;
  display:grid;place-items:center;
  border-radius:12px;
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--ink-700);
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.icon-btn:hover{background:var(--sand);color:var(--ink-900);}
.icon-btn svg{width:18px;height:18px;}
.menu-toggle{display:none;}

.header-search{
  max-height:0;
  overflow:hidden;
  transition:max-height .24s ease;
}
.header-search.is-open{max-height:80px;}
.header-search form{
  display:flex;
  gap:8px;
  padding:0 0 14px;
}
.header-search input{
  flex:1;
  height:46px;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:var(--surface);
  padding:0 16px;
  font-size:15px;
  color:var(--ink-900);
}
.header-search input::placeholder{color:var(--ink-300);}
.header-search input:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 4px var(--brand-50);
}

.channel-bar{border-top:1px solid var(--line);}
.channel-inner{display:flex;align-items:center;height:44px;transition:height .2s ease;}
.site-header.is-stuck .channel-inner{height:40px;}
.channel-list{
  display:flex;
  align-items:center;
  gap:24px;
  height:100%;
  overflow-x:auto;
  scrollbar-width:none;
}
.channel-list::-webkit-scrollbar{display:none;}
.channel-list a{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:100%;
  font-size:15px;
  font-weight:600;
  color:var(--ink-500);
  white-space:nowrap;
  transition:color .18s ease;
}
.channel-list a:hover{color:var(--ink-900);}
.channel-list a.active{color:var(--ink-900);}
.channel-list a.active::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  border-radius:2px;
  background:var(--brand);
}

/* ---------- 抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(14,15,18,.42);
  opacity:0;visibility:hidden;
  transition:opacity .24s ease,visibility .24s;
  z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.site-drawer{
  position:fixed;
  top:0;right:0;
  width:min(320px,86vw);
  height:100%;
  background:var(--surface);
  z-index:80;
  transform:translateX(102%);
  transition:transform .28s cubic-bezier(.2,.7,.3,1);
  padding:18px 20px 28px;
  overflow-y:auto;
  display:flex;
  flex-direction:column;
  gap:18px;
}
.site-drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-head span{font-size:15px;font-weight:800;}
.drawer-nav{display:flex;flex-direction:column;}
.drawer-nav a{
  padding:14px 4px;
  font-size:16px;
  font-weight:600;
  color:var(--ink-700);
  border-bottom:1px solid var(--line);
}
.drawer-nav a.active{color:var(--brand);}
.drawer-sub{display:flex;flex-direction:column;gap:10px;}
.drawer-sub input{
  height:46px;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:0 14px;
  font-size:15px;
}

/* ---------- 分类页头部 ---------- */
.cat-hero{padding:40px 0 0;}
.hero-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  padding-bottom:28px;
  border-bottom:1px solid var(--line);
}
.hero-copy h1{
  font-size:clamp(32px,5.4vw,56px);
  font-weight:900;
  line-height:1.06;
  letter-spacing:-.02em;
}
.hero-sub{
  margin-top:14px;
  max-width:640px;
  font-size:15px;
  line-height:1.75;
  color:var(--ink-500);
}
.hero-banner{
  position:relative;
  margin-top:28px;
  border-radius:var(--radius-lg);
  overflow:hidden;
  background:var(--sand);
  aspect-ratio:16/6;
  box-shadow:var(--shadow-1);
}
.hero-banner img{
  width:100%;height:100%;
  object-fit:cover;
  object-position:bottom center;
}
.hero-banner::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,15,18,.06),rgba(14,15,18,.62));
}
.banner-tag{
  position:absolute;
  left:24px;bottom:22px;
  z-index:2;
  display:flex;
  flex-direction:column;
  gap:4px;
  color:#fff;
}
.banner-tag strong{font-size:18px;font-weight:800;}
.banner-tag span{font-size:13px;color:rgba(255,255,255,.78);}

/* ---------- 锚点条 ---------- */
.anchor-bar{
  position:sticky;
  top:104px;
  z-index:40;
  margin-top:24px;
  background:rgba(251,250,248,.94);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.site-header.is-stuck ~ .anchor-bar{top:96px;}
.anchor-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  height:56px;
}
.anchor-pills{
  display:flex;
  gap:10px;
  overflow-x:auto;
  scrollbar-width:none;
}
.anchor-pills::-webkit-scrollbar{display:none;}
.anchor-pill{
  display:inline-flex;
  align-items:center;
  height:36px;
  padding:0 16px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--surface);
  font-size:14px;
  font-weight:600;
  color:var(--ink-700);
  white-space:nowrap;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.anchor-pill:hover{background:var(--brand);border-color:var(--brand);color:#fff;}
.anchor-hint{font-size:13px;color:var(--ink-500);white-space:nowrap;}

/* ---------- 通用板块 ---------- */
.section{padding:var(--section-y) 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  margin-bottom:32px;
}
.section-head h2{font-size:clamp(24px,3.4vw,34px);font-weight:800;}
.section-note{
  max-width:420px;
  font-size:14px;
  line-height:1.75;
  color:var(--ink-500);
}

/* ---------- 榜单 ---------- */
.rank-list{
  border-top:1px solid var(--line);
}
.rank-item{
  display:flex;
  align-items:center;
  gap:20px;
  padding:22px 14px;
  margin:0 -14px;
  border-bottom:1px solid var(--line);
  border-radius:14px;
  transition:background-color .18s ease;
}
.rank-item:hover{background:var(--sand);}
.rank-no{
  flex:0 0 64px;
  width:64px;
  text-align:center;
  font-size:44px;
  font-weight:900;
  line-height:1;
  font-variant-numeric:tabular-nums;
  color:var(--ink-300);
}
.rank-no.is-top{color:var(--brand);}
.rank-cover{
  flex:0 0 80px;
  width:80px;
  aspect-ratio:1/1;
  border-radius:var(--radius);
  overflow:hidden;
  background:var(--sand);
}
.rank-cover img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.rank-item:hover .rank-cover img{transform:scale(1.04);}
.rank-main{flex:1 1 auto;min-width:0;}
.rank-main h3{
  font-size:19px;
  font-weight:700;
  line-height:1.35;
  margin-bottom:6px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.rank-main p{
  font-size:14px;
  line-height:1.7;
  color:var(--ink-500);
  display:-webkit-box;
  -webkit-line-clamp:1;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.rank-score{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  gap:12px;
}
.score-num{
  font-size:20px;
  font-weight:800;
  font-variant-numeric:tabular-nums;
}
.score-bar{
  width:110px;
  height:6px;
  border-radius:999px;
  background:var(--sand);
  overflow:hidden;
}
.score-bar i{
  display:block;
  height:100%;
  border-radius:999px;
  background:var(--brand);
}
.stars{
  font-size:12px;
  letter-spacing:1.5px;
  color:var(--brand);
  white-space:nowrap;
}

/* ---------- 折叠面板 ---------- */
.specs-intro p{
  margin-top:14px;
  font-size:15px;
  line-height:1.8;
  color:var(--ink-500);
  max-width:340px;
}
.acc{border-top:1px solid var(--line);}
.acc-item{border-bottom:1px solid var(--line);}
.acc-head{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:22px 0;
  text-align:left;
  font-size:17px;
  font-weight:700;
  color:var(--ink-900);
  transition:color .18s ease;
}
.acc-head:hover{color:var(--brand);}
.acc-icon{
  position:relative;
  flex:0 0 24px;
  width:24px;height:24px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--surface);
}
.acc-icon::before,.acc-icon::after{
  content:"";
  position:absolute;
  left:50%;top:50%;
  background:var(--ink-700);
  transform:translate(-50%,-50%);
  border-radius:2px;
}
.acc-icon::before{width:10px;height:1.5px;}
.acc-icon::after{width:1.5px;height:10px;transition:transform .22s ease,opacity .22s ease;}
.acc-item.is-open .acc-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.acc-item.is-open .acc-head{color:var(--brand);}
.acc-item.is-open .acc-icon{border-color:var(--brand);}
.acc-item.is-open .acc-icon::before{background:var(--brand);}
.acc-body{
  max-height:0;
  overflow:hidden;
  transition:max-height .22s ease;
}
.acc-inner{
  padding:0 0 24px 18px;
  border-left:3px solid transparent;
  transition:border-color .22s ease;
}
.acc-item.is-open .acc-inner{border-left-color:var(--brand);}
.acc-inner p{
  font-size:15px;
  line-height:1.85;
  color:var(--ink-700);
}
.acc-inner p + p{margin-top:10px;}

/* ---------- 专题四宫格 ---------- */
.topic-card{
  display:block;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease;
  margin-bottom:24px;
}
.topic-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.topic-thumb{
  aspect-ratio:1/1;
  background:var(--sand);
  overflow:hidden;
}
.topic-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.topic-card:hover .topic-thumb img{transform:scale(1.04);}
.topic-title{
  display:block;
  padding:16px 18px 18px;
  font-size:16px;
  font-weight:700;
  line-height:1.45;
}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.faq-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease;
}
.faq-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);}
.faq-card h3{
  font-size:17px;
  font-weight:700;
  margin-bottom:10px;
}
.faq-card h3::before{
  content:"";
  display:inline-block;
  width:8px;height:8px;
  border-radius:2px;
  background:var(--brand);
  margin-right:10px;
  transform:translateY(-2px);
}
.faq-card p{font-size:15px;line-height:1.8;color:var(--ink-700);}

/* ---------- 深色 CTA ---------- */
.cta-block{
  background:var(--ink-block);
  border-radius:var(--radius-xl);
  padding:44px 40px;
  color:#fff;
  position:relative;
  overflow:hidden;
}
.cta-block::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.12) 1px,transparent 1px);
  background-size:18px 18px;
  opacity:.55;
  pointer-events:none;
}
.cta-inner{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.cta-inner h2{
  color:#fff;
  font-size:clamp(22px,3vw,30px);
  font-weight:800;
  margin-bottom:12px;
}
.cta-inner p{font-size:15px;color:rgba(255,255,255,.72);max-width:520px;}
.cta-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.btn-outline-light{
  border:1px solid rgba(255,255,255,.28);
  color:#fff;
}
.btn-outline-light:hover{background:rgba(255,255,255,.1);}
.cta-note{
  margin-top:18px;
  font-size:13px;
  color:rgba(255,255,255,.5);
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-block);
  color:#fff;
  padding:64px 0 28px;
  margin-top:var(--section-y);
}
.footer-col{margin-bottom:32px;}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:900;
  margin-bottom:14px;
}
.footer-brand .brand-mark{width:32px;height:32px;flex:0 0 32px;border-radius:10px;}
.footer-brand .brand-mark svg{width:18px;height:18px;}
.footer-desc{
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.72);
  max-width:280px;
}
.footer-col h4{
  color:#fff;
  font-size:15px;
  font-weight:800;
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{
  font-size:14px;
  color:rgba(255,255,255,.72);
  transition:color .18s ease;
}
.footer-col ul a:hover{color:#fff;text-decoration:underline;text-decoration-color:var(--brand);text-underline-offset:4px;}
.footer-sub{display:flex;gap:8px;}
.footer-sub input{
  flex:1;
  min-width:0;
  height:46px;
  border-radius:var(--radius-sm);
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.06);
  color:#fff;
  padding:0 14px;
  font-size:14px;
}
.footer-sub input::placeholder{color:rgba(255,255,255,.45);}
.footer-sub input:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 4px rgba(255,74,43,.18);
}
.footer-sub .btn{height:46px;padding:0 20px;}
.footer-mid{
  display:flex;
  flex-wrap:wrap;
  gap:22px;
  padding:22px 0;
  border-top:1px solid rgba(255,255,255,.12);
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-mid a{
  font-size:13px;
  color:rgba(255,255,255,.72);
  transition:color .18s ease;
}
.footer-mid a:hover{color:#fff;text-decoration:underline;text-decoration-color:var(--brand);text-underline-offset:4px;}
.footer-bottom{padding-top:24px;}
.footer-bottom p{
  font-size:13px;
  color:rgba(255,255,255,.72);
}
.footer-bottom .tiny{
  margin-top:8px;
  font-size:12px;
  color:rgba(255,255,255,.45);
}

/* ---------- 入场动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .3s cubic-bezier(.2,.7,.3,1),transform .3s cubic-bezier(.2,.7,.3,1);
}
.reveal.is-in{opacity:1;transform:none;}

@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* ---------- 响应式 ---------- */
@media (min-width:640px){
  :root{--section-y:72px;}
  .grid-container{padding-left:24px;padding-right:24px;}
}
@media (min-width:1024px){
  :root{--section-y:96px;}
  .grid-container{padding-left:32px;padding-right:32px;}
}
@media (min-width:1200px){
  .grid-container{max-width:1200px;}
}

@media (max-width:1023px){
  .hero-banner{aspect-ratio:16/7;}
  .anchor-bar{top:96px;}
}

@media (max-width:767px){
  .faq-grid{grid-template-columns:1fr;}
  .rank-item{flex-wrap:wrap;gap:16px;padding:20px 12px;margin:0 -12px;}
  .rank-no{flex:0 0 44px;width:44px;font-size:36px;}
  .rank-cover{flex:0 0 64px;width:64px;border-radius:14px;}
  .rank-main{flex:1 1 calc(100% - 92px);}
  .rank-score{
    flex:1 1 100%;
    margin-left:60px;
    justify-content:flex-start;
    gap:10px;
  }
  .score-bar{width:88px;}
  .cta-block{padding:32px 22px;border-radius:var(--radius-lg);}
  .cta-inner{align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
}

@media (max-width:639px){
  :root{--section-y:56px;}
  body{font-size:16px;}
  .channel-bar{display:none;}
  .menu-toggle{display:grid;}
  .header-cta{display:none;}
  .trend-wrap{display:none;}
  .hero-head{align-items:flex-start;}
  .hero-head .btn{width:100%;}
  .hero-banner{aspect-ratio:4/3;border-radius:var(--radius);}
  .banner-tag{left:18px;bottom:16px;}
  .banner-tag strong{font-size:16px;}
  .anchor-inner{height:52px;}
  .anchor-hint{display:none;}
  .rank-inner{gap:14px;}
  .rank-main h3{font-size:17px;}
  .topic-title{font-size:15px;padding:14px;}
  .footer-sub{flex-direction:column;}
  .footer-sub .btn{width:100%;}
}